Update architecture image (#2)

* Update architecture image

* Add image

* Update README.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

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Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: ypeckstadt

README.md

@@ -6,7 +6,7 @@ ScalarDB MCP Server is a [Model Context Protocol (MCP)](https://modelcontextprot
 
 ScalarDB MCP Server works seamlessly whether you're using a single database or multiple databases. Unlike traditional approaches that require separate MCP servers for each database, ScalarDB MCP Server leverages the [multi-storage capabilities of ScalarDB](https://scalardb.scalar-labs.com/docs/latest/multi-storage-transactions) to provide unified access to heterogeneous databases (PostgreSQL, MySQL, Cosmos DB, DynamoDB, etc.) through a single MCP server. By simply submitting queries in natural language, the server automatically executes the appropriate operations across your databases, improving and accelerating decision-making processes.
 
-<img src="docs/images/architecture.png" alt="ScalarDB MCP Server Architecture" width="400">
+<img src="docs/images/architecture.png" alt="ScalarDB MCP Server Architecture" width="800">
 
 ### Key features